eunomia-controller/distribution/generate/html/html.js

'use strict';

var fs = require('fs');
var ejs = require('ejs');
var system = require('./../../variables')('./eunomia.json');

var isMissing = function isMissing(data, message) {
  return typeof data === 'undefined';
};

exports.generate = function (writeToPath, distToPath, stats, production) {
  return require('./../../task/index')('html', function (resolve, reject) {
    if (!fs.existsSync('./eunomia.json')) {
      reject("eunomia.json required within the root of the project");
    } else {
      var eunomia = system;

      if (!eunomia.generate.html.enabled) {
        resolve();
        return false;
      }

      try {
        if (!production) {
          // Find the primary chunk used within this project
          var bundle = stats.compilation.chunks.find(function (x) {
            return x.name === 'main';
          }).files[0];
          if (bundle == null || typeof bundle === 'undefined' || bundle == '') {
            return reject('No main chunk found.');
          }

          // Get the contents of the html.ejs file to structure the index.html
          var fullPath = __dirname + '/html.ejs';
          var template = fs.readFileSync('' + fullPath, 'utf8');
          if (template == null || typeof template === 'undefined' || template == '') {
            return reject('File \'html.ejs\' contains no content.');
          }

          // Generate the rendering function for the html.ejs file
          var render = ejs.compile(template, { filename: '' + fullPath });
          if (typeof render !== 'function') {
            return reject('Render contains no function.');
          }

          // Render the output for the index.html from the html.ejs containing certain variables
          var output = render({ debug: true, bundle: '' + distToPath + bundle, config: system.generate.html.app });
          if (output == null || typeof output === 'undefined' || output == '') {
            return reject('Rendered output contains no content.');
          }

          // Write the new index.html to a file in the public folder
          fs.writeFileSync(writeToPath + '/index.html', output, 'utf8');
          fs.exists(writeToPath + '/index.html', function (exists) {
            if (exists) return resolve();else return reject('\'index.html\' has not been created');
          });
        } else {
          try {
            fs.exists('' + system.config.webpack, function (exists) {
              if (exists) {
                var webpackConfig = require('../../../../' + system.config.webpack);
                var _fullPath = __dirname + '/html.ejs';
                var assets = JSON.parse(fs.readFileSync('' + writeToPath + distToPath + 'assets.json', 'utf8'));
                var _template = fs.readFileSync('' + _fullPath, 'utf8');
                var _render = ejs.compile(_template, { filename: '' + _fullPath });
                var _output = _render({ debug: webpackConfig.debug, bundle: assets.main.js, config: system.generate.html.app, fonts: typeof system.generate.html.fonts === 'undefined' ? [] : system.generate.html.fonts });
                fs.writeFileSync(writeToPath + '/index.html', _output, 'utf8');
                resolve();
              } else {
                reject("Webpack config not found. eunomia.json requires a config.webpack path");
              }
            });
          } catch (e) {
            console.log(e);
            reject(e);
          }
        }
      } catch (e) {
        console.log(e);
        reject("Failed to create a index.html");
      }
    }
  });
};